Duplicating mechanism



Oct. 21, 1941.

A. J. LEVENHAGEN ETAL DUPLIGATING MECHANISM Filed Sept. 26, 1940 4shetS-sheet 1 Ober Z'/7Zo'rrzson.

Oct. 21, 1941.l

A. J. LEVENHAGEN 'ET AL 2,260,040A DUPLICATING' MECHANISM Filed Sept.26, 1940 4 Sheets-Sheet 2 ocpzl, 1941.

A. J. LEVENHAGEN ETAL DUPLICATING MECHANISM Filed Sept. 26, 1940 4Sheets-Sheet 5 Ar r l SSS I'NVENTORS r ven/za gell.

jef/Mfg E5 www, @@fugg@ 0d.4 2l, v1941 A. J. LEVENHAGEN ET A1. 2,260,040

y DUPLICATING MECHANISM I Filed Sept. 26, 1940 4 Sheets-Sheet 4 PatentedOct. 21, 1941 Morrison, Oak Park, Ill., assignor to Ditto, In,corpcratcd, Chicago, Ill., a corporation of West Virginia ApplicationSeptember-26, 1940, Serial-No. 358,406

19 claims. (C1. 10i- 132) This invention relates to duplicatingmechanismz and particularly to the mechanism for str-ipping copy sheetssuccessively from the gelatin pad carried by the drum of a rotarygelatin duplicating machine, and it has for i'ts'object the provision ofal new-and improved form'and arrangement of* partsA by which improvedstripping of; the copyf sheets shall be attained.y

In gelatin machines ofv this type heretofore, aV driven roller has beenprovided in slightly spaced relation to the face of the drum, withcooperating means actuated in timed relation for pushing; theiorwardedge portion of a copy sheetfoutwardlyfrom the drum intooperative engagement with` the driven Vroller for pulling the copy sheetloose from the gelatin pad for deliveryY toa tray. This cooperatingmeans f or pushingthe end of the copyV sheet outwardly has been ofvarious forms, comprisingv a, non-rotary pusher member; as shown byHernlund, MarchevV and Morrison Patent No. 2,034,903, or a` roller lasshown by Whitehead Patent No. 2,094,628. The non-rotary pusher memberhas been found preferablieY in some respects, in that it may be made ofcomparatively small size so as to be capable of entering the spacebetween two forwarding rollers into close proximity to the bite of therollers for pushing the end of a copy sheet definitely into the gripofthe rollers. Great care hasv been necessary, however, in connection with'Y arrangements of this type for preventing smearing of the copy sheetsby pressure of the pusher member or members on the sheet after theVsheet has been gripped by the cooperating stripping rollers.

For enabling us to use a non-rotary type of pusher member and still toavoid the danger of smearing the copy sheets, we have provided a form ofmechanism comprising a plurality of spaced fingers carried by twoswin'gingly mounted arms so as to be movable to the bite of thestripping rollers for carrying the end of the copy sheet into thedesired operative position,v

together with means for giving the lingers an auxiliary movement withrespect to said arms out of engagement with the copy sheet at just themoment when the sheet reaches the position at which it is gripped. Inthe improved arrangement illustrated, the fingers are mounted on a rockshaft carried by said arms `so that, upon a slight rocking movement of`the shaft, the lingers are swung in unison away from the copy sheet,one of the cooperating stripping rollpermitting suchswinging movement ofthe fingers. Y

I n the preferredr form of` the invention, the shaft bye-Which the.pusher, ngers are Carried is nrof.i 1,.e iV withk a plurality- 0f"Vcylindral'body portions. rotatably mounted thereon so as to act asaroller member `for pressing the copy sheet against the'driven rollerAfor assisting inthe stripping operation. Bythe u se of two rollerspressing the copy sheet into engagementwith the driven rollerat slightlyspaced points thereabout, the grip on the copy sheet is greatlystrengthened and the eiectiveness of the strippine mechanism iscorrespondingly increased- It is. another object of this invention toimprove mechanisms of thisrtypevv in sundry details hereinafter pointedout. The preferred means by which the several objects have beenvattainedare illustrated in the accompanying drawings,` in which- Fig. 1 is alongitudinal vertical sectional view through the preferred form ofmechanism embodying the invention;

Fig, V2 -isga transverse vertical sectional view through-the machinetaken substantially at the line 2 2 o f Fig. 1; l

Fig. 3 is an enlarged detail view, being substantially a section takenat the lineV 3- 3 of Fig. 1;

Fig; 4 is. a vertical sectional view s tantially at the line 4 -4 ofFig. 2;

Fig., 5 is a horizontal sectional view taken subs tantiallyl at the line5,-5 of Fig. 4;

Fig. 6 is a vertical sectionalview taken substantially at the line 6- -6of` Fig. v2; and

Figs. 7, 8 and 9 are views similar to a portion of Fig. 6, but showingchanged position-s ofcertain of the parts.

Referring now yto the several gures of the drawings, in which`corresponding parts are in-` dicated'by the same reference characters,I5 and I6 indicate standards at opposite sides of the machine rigidlyconnected together for supporting a drum II by means of a supporting anddriving shaft I8. In the arrangement shown, the shaft I8 is providedwith -a large gear I9 iixedly mounted thereon, Which mesheswith a pinion20 rotatably mounted uponY a stud 2| carried by the frame member I5. Thepinion 2li-is rigidly connected `with a p ulley 22 which is driven by abelt .23 from a pulley 24 which in turn is driven by a pulley 25 and abelt 26 from any suitable source of power.

' As lis best shown in Fig 1 the drum II is taken subers being cut awayopposite to the fingers for 55 cui;l away at one side to provide arecess in its wall at one side, as indicated at 21. Spindles 28 and 29are provided in the drum 21 for supporting a gelatin band 30 wrappedabout the circular Wall portion of the drum, as shown in said Fig. 1.

Above the drum I1, a table or tray 3| is provided for supporting a copysheet 32 in position for delivery to the drum, as is well understood inmachines of this type. A margin bar 33 is provided below the tray 3| inposition for engaging the lower end of the copy sheet 32 for holding itin position to be applied to the gelatin band 36 for making the desiredcopy thereon.

As usual in machines of this type, the copy sheet 32 is pressed againstthe band 30 vby a vplaten roller 34 for insuring the production of thedesired impression upon the sheet.

Inasmuch as the parts so far described form in and of themselves no partof the present invention, it is believed to be unnecessary to describesuch parts. further in detail.

In connection with the machine, stripping mechanism is provided forengagingv a copy sheet carried around by the gelatin band and pullingthe sheet off the drum for delivery into a tray 35 adjacent to the drum.This means lcomprises a stripping rollei` 36 rotatably mounted betweenthe standards I and I6 by means of a shaft 31, which is continuouslydriven by means of a pinion 38 meshing with a large gear 39 mounted torotate with the drum I1. The arrangement is such that as the drumrotates in counterclockwise direction in Fig. 6, the stripping roller 36rotates in clockwise direction in said fgure. Above the roller 36, anVauxiliary stripping roller 40 is provided, 10- tatably supported inposition by means of a shaft 4I mounted in the standards I 5 and I6, theroller 40 being in Yconstant engagement with the roller 36. Y

Means is provided actuated in timed; relationV to the rotation of thedrum I1 for engaging the leading end of a copy' sheet 42 carried by thedrum for moving the end of the sheet outwardly into the bite of therollers 36 and 48. This means comprises a heavy shaft 43rotatablyrnounted between the standards I5 and I6, having arms 44 xedlymounted thereon at opposite ends of the drum, such arms being providedat their free end portions with a shaft 45 rotatably mountedtherebetween. The shaft 43 is provided with a downwardly extendingarm 46which is normally held swung to the limit of its outward movement bymeans of a heavy coiled spring 41 for holding the arms- 44 movedinwardly to the limit of their motion, as shown in Fig. 6. The shaft 43is also provided with an arm 48 provided at its free end with a roller49 which engages a cam 50 rigidly mounted upon the drum I1, as isclearly shown in Fig. 2. The shape of the cam 50 is such as to permitthe shaft 45 and the arms 44 to move inwardly into the recess 21 of thedrum as soon as the drum reaches a position for permitting suchmovement, and is of such shape as to force the arms and the shaftoutwardly again by a quick motion at the' time lwhen the wall of thedrum approaches into close proximity to the shaft, as shown in Figs. 6and 7.

In the arrangement shown, the shaft 45 is provided with an arm 5I xedlymounted thereon, which is normally held by a spring 52 in engagementwith a pin 53 carried by the arm 44, as shown in Fig. l6. Thearrangement is such that upon the application of pressure upon the arm5I toward the left in said Fig. 6, the shaft 45 is adapted to rock incounterclockwise direction in said figure for carrying the arm 5I out ofengagement with the pin 53.

Upon the shaft 45, we have provided a roller member 54, formed in aplurality of sections. Between the roller sections 54, we have mountedpusher fingers 55 which are rigidly connected with theV shaft so as torotate therewith. The fingers 55 are arranged in alignment with eachother, pointing directly outwardly.

In operation, when the drum I1 reaches the position as shown in Fig. 6,with the ngers 55 positioned opposite to the extending end portion ofthe copy sheet 42, the roller 49 reaches the end of the low portion ofthe cam 50. Upon continued rotation of thedrum in counterclockwisedirection in Fig. 6, the roller 49 and arm 48 move the shaft 43 inclockwise direction in said Fig. 6 for I bringing the fingers 55 intoengagment with the copy sheet 42. As rotation of the drum continues, thefingers 55 cause the end of the sheet 42 to pass directly into the biteof the rollers 36 and 46, the roller 48 being circumferentially groovedat a plurality of points therealong, as indicated at.

56, for receiving the ends of the fingers 55 therein. At substantiallythe end of the outward movement of the fingers 55, a pin 51, carried bythe arm 5I, is brought into contact with a set screw 58 adjustablymounted in an arm 59 carried by the framework, so that, upon continuedoutward movement of the arms 44, the shaft is given a slight rockingmovement in counterclockwise direction against the action of the spring52 for carrying the fingers in the direction away from the roller 36,such fingers being free to move upwardly within theigrooves 56 of theroller 40, as is clearly shown in Fig. 9. By this rocking movement ofthe shaft 45, the lingers 55 are prevented from pressing against' thecopy sheet 42` and the roller 36, the'paper being thus protected againstany tendencyto be smeared or torn when gripped between Ythe vrollers 36and 48.

The arrangement is such that the roller 54 is brought into operativeengagement with the roller 36 at the end of the outward movement ofthestripper parts. The roller 54 thus cooperates with the roller 40 forpressing the copy sheet against the driven roller 36, so that the dangerof any slippage of the copy sheet with respect'to the roller 36 isobviated, the copy sheet being held in engagement with the roller 36through a substantialcircumferential portion of the surface of saidroller. A Y l y l While we prefer to employ the form and arrangement ofparts as illustrated and as above de-v scribed, the invention is not 'tobe limited to the arrangement shown, except so far as the claims may beso limited, it being understood that changes might well be made in theform and arrangement of parts without departing from the spirit of ourinvention.

We claim:

1.v In a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, astripping roller rotatably mounted on said frame in slightly spacedrelation to the drum, means for driving said roller, apusher membermovably mounted on said frame adapted by outward movement in timedrelation to the rotation of the drum to engage the forward end portionof a copy sheet f carried Vby the drum and to push the sheet outeedliwardly into engagement withwsaid drive'nfroller, means for moving saidpusher memberoutwardly, means for pressing said copy sheet against saiddriven roller for pulling the sheet off thedruni, and means actuated intimed relation to the Youtwardmovement of the pusher memberforggivingthe pusher member a slight rocking movement out of engagement with saidcopy Sheet. Y' 2. In a rotary duplicating yI nechanism, the combinationof a frame, a drum rotatably'inounted thereon and -having a recess inits vface at one side of the drum, means for supporting a copy sheetreleasably on said drum`with-its-for1 ward end portion extending oversaid; recess, a stripping roller rotatably mounted on said frame inslightly spaced relation to the drum, iriells for driving said roller, apusher member movably mounted on said frame so as'to'be movable tan;gentially of said driven roller, adapted vby outward movement in timedrelation to the rotation of the' drum to engage the forwardl end portionof a copy sheet carried by the drum and to push the sheet outwardly intoengagement with said driven roller, means for moving Asaid pusher memberoutwardly, means for pressing said forward end portion of the copy sheetagainst said driven roller for pulling the sheetV off thedrum, and meansfor giving said pusher-member a slight rocking movement away from Ysaiddriven roller as the pusher member comes to its outermost position forpreventing the pusher member from pressing on said roller.

Y 3. In a rotary duplicating rniec'hanism, Ythe combination of a frame,a drum rotatably mounted thereon and having a recessin its face a-t oneside of the drum, means for supportingf'a copy sheet releasably on saiddrum withY its for-4 ward end portion extending over said recess, astripping roller rotatably mountedA on said frame in slightly spaced'relation' to the drum, means for driving said roller, arms pivotallymounted on said frame at opposite ends'of Asaid drum, a pusher membermounted between said arms-so as to have a slight rocking movement withrespect to the arms andarranged so that upon outward swinging movementof the arms said -p'u'sh'er member moves tangentially of the roller forcarrying the forward end portion vof a copy sheet on the drum intoengagement with said roller,

means for swinging said arms outwardly, means y for pressing saidforward end portion of thecopy sheet against said roller `for pullingthe-sheetv oi the drum, and means for giving said pusher member a slightrocking movement with respect to said arms away from said driven rolleras the i pusher member comes to its`outermost position for preventingthe pusher member from pressing on said roller.

4. In a rotary duplicating mechanism, the; combination of a frame, adrum rotatably mounted thereon and having a recess in its'fac'e at oneside of the drum, means for'supportin'gia copy sheet releasably on saiddrum-'withits'for'` the rotation of thedrum ,for carrying saidsecondshaft intorand out ofthe recess of said drum, fingers iixedlymounted on said'secondshaft in position to engage vthe forward endportion of said copy sheet onv the drum upon outward movementorlsaidsecond shaft for moving said copy sheet intoengagement with saidroller, means for pressing said forward end portion o f the copy sheetagainst said 'roller for pulling the sheet off thedrum, Yand meansforgiving said second shaft a slight rocking movement forcarryingsaid'lngersaway from the roller as the ngers cometo theiroutermost positions for preventing the 1in-vr gersfrom pressing onsaid'roller. t t "'5'.' In` a rotary j duplicating mechanism, thecombination of a frame, a drumrotatably mount'-r ed thereon andr havingarecess in its face at on'eiside of the drum, means for supporting a copysheet'releasably on said drum with its for- Wardv end'. portionextending over saidk recess, a

' stripping roller rotatably-mounted onsaid frame 'severalsections ofthe pusher member'pos'itionedopposite@ to; the grooves f in *said second"roller,- meansjormoving said 'pusher member fo'utxirard-x ly, and means"actuated vin Atimed relation 'tofth'e outward movementA of* thevpl'isher memblerfor giving the-several sections of said' pusher-me ifslight` rocking movement inthe grooves of said second rolleraway'ffrni'fthef first-namedroller` for" ,preventing the "pusher memberfrom' pressing on said'iirstfnamed'roller.- L

c bin'atio of a'fifam'e,l adrum'k rotatably mounted'v thereonanvil'liavi'rig'l'afrefcess' -in "itsif'ace at one side of thedrun,means for supporting a copy sheet releasably on said drum with'itsforward end portionextendinfg over said recess, a stripping'rollerrotatablymounted onlsaid frame in slightly spaced relation to the drum,meansVfor driving said roller, a second 'roller rotatably mountedon saidframein engagement with said first-named roller soY as to cooperatetherewith for pulling a copy sheet off the drum, said roller beingcircumfe'rentially groove'd at a plurality of points therealong, a"shaftv movably mounted' on said frame so' as to bemovable toward and'from the bite ofsaidtwo rollers and so as to be rocked slightly withrespect to its supporting means, fingers `V"on said shaft'inposition-tofenter the grooves'ofsai'd second' roller'adapted by'outwardV rnovf'ernent'v intime'd relationtothe rotation' of the drum toengage the forward end Iportion of a-copyf sheet on the drum and topush: the sheet outwardly into the bite ofsaidtwo rollers, rn'eans forinoi'fing said vshaft and ngers outwardly,"and me'ansfactuatd in timedrelation tothe outward movement of the shaft and fingers for giving theshaft aslight rocking movement for swinging said fingers in said'grooves away from' the first: namedy 'rolleri for preventing the fingersfrom' pressing on said'rst-named roller. i ier-f7( In a rotary"duplicating mechanism, the' `In Va'rotaryduplicating mechanismj thecombination of a frame, a drum rotatably mounted thereon and having arecess in its face at one side of the drum, means for supporting ra copysheet releasably on said drum with its forward end portion extendingover said recess, a stripping roller rotatably mounted on said frame inslightly spaced relation to the drum, means for driving said roller, aroller member movably mounted on said frame so as to be movableoutwardly toward'said first-named roller in substantially a tangentialdirection with respect to said rst-named roller so as to engage saidroller at the -limit `of, its outward movement, a pusher membersvvingingly mounted with respect to said second roller member adaptedupon the outward movement of said second roller member in timed relationto the rotation of the drum to engage the forward end portion of thecopy sheet on the drum and to move it outwardly into engagement withsaid first-named roller into position to be engaged between said tworollers, and means for giving said pusher member a slight rockingmovement away from said first-named roller at the endwof the outwardmovement of said second roller member for preventing said pusher memberfrom pressing on said first-named roller.

8. vIn a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, astripping roller rotatably mounted on said frame in slightly spacedrelation to the drum,. means for driving said roller, a shaft movablymounted on said frame so as to be movable outwardly toward saidfirst-named roller in substantially a tangential direction with respectto said rstnamed roller, a plurality of roller sections rotatablymounted on said shaft so as to engage said first-named roller at thelimit of the outward movement of said shaft, a plurality yof pusherfingers fixedly mounted on said shaft between successive roller sectionsadapted upon the outward movement of said shaft in timed relation totherotation of the drum to engage the forward end portion of the copy sheeton the drum and to move it outwardly into engagement with saidfirst-named roller into position to be engaged between said two rollers,and means for giving said pusher fingers a slight swinging movement awayfrom said first-named roller at the end of the outward movement of saidshaft for preventing said lingers from pressing on said first-namedroller.

9. In a rotary duplicating mechanism, the combination of a frame, a drumrotatably mounted thereon and having a recess in its face at one side ofthe drum, means for supporting a copy sheet releasably on said drum withitsv forward end portion extending over said recess, a stripping rollerrotatably mounted on said frame in slightly spaced relation to the drum,means for driving said roller, arms pivotally mounted on said frame atopposite ends of said drum, a shaft mounted between said arms `so as tohave rotary movement with respect to the arms and arranged so as to movewith said arms outwardly toward said first-named roller in substantiallya tangential direction with respect to said first-named roller, aplurality of roller sections; rotatably mounted on said shaft so as toengage said firstnamed roller at the limit of the outward movement ofsaid shaft, a plurality of pusher lingers xedly mounted on said shaftbetween successive roller sections adaptedupon the outward movement ofsaid shaft in timed relation to the rotation of the drum to engage theforward end portion of the copy sheet on the drum and to move itoutwardly into engagement with said firstnamed roller into position tobe engaged between said two rollers, means for holding said ngersnormally in predetermined position with respect to said arms but adaptedto yield for permitting a slight swinging movement of the fingers, anarm extending from said shaft, and adjustable means carried by saidframe adapted by engagement with said last-named arm at the end of themovement of said shaft outwardly to rock said shaft and said fingers inthe direction away from said first-named roller for preventing saidngers from pressing on said first-named roller.

10. In a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, astripping roller rotatably mounted on said frame in slightly spacedrelation to the drum, means for driving said roller, a second rollerrotatably mounted on said frame in engagement with said first-namedroller so as to cooperate therewith for pulling a copy sheet off thedrum, said roller being circumferentially grooved at a plurality ofpoints therealong, a shaft movably mounted on said frame so as to bemovable toward and from the bite of said two rollers and so as to berocked slightly with respect to its supporting means, lingers on saidshaft in position to enter the grooves of said second roller adapted byoutward movement in timed relation to the rotation of the drum to engagethe forward end portion of a copy sheet on the drum and to push thesheet outwardly into the bite of said two rollers, means for moving saidshaft and fingers outwardly, roller sections rotatably mounted on saidshaft between said fingers in position to engage said firstnamed rollerat the end of the outward movement of said shaft, and means actuated intimed relation to the outward movement of said shaft and fingers forgiving the shaft a slight rocking movement for swinging said fingers insaidl grooves away from the first-named roller for preventing thelingers from pressing on said first-named roller.

11. In a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, astripping roller rotatably mounted on said frame in slightly spacedrelation to the drum, means for driving said roller, arms pivotallymounted on said frame at opposite ends of said drum, a shaft mountedbetween said arms so as to have rotary movement with respect to the armsand arranged so as to move with said arms outwardly toward saidfirst-named roller in substantially a tangential direction with respectto said firstnamed roller, a plurality of roller sections rotatablymounted on said shaft so as to engage said first-named roller at thelimit of the outward movement of said shaft, a plurality of pusherlingers xedly mounted on said shaft between successive roller sectionsadapted upon the outward movement of said shaft in timed relation to therotation of the drum to engage the forward end portion of the copy sheetkyon the drum and .to move it outwardly into' engagement with saidfirst-named rollerinto position to be engaged between said two rollers,y'means for holding said Afingers nornfially, in predetermined positionwith 'respect to said arms but adapted to yield for permitting a'slightswinging movement vof the fingers, an arm extending'. from said shaft,adjustable'. .means carried 4by said frame adapted by engagement withsaid lastnamed arm at the end of .the movementv of'said shaft outwardlyto rock said shaft and said ngers inthe direction away'from saidfirst-named roller for preventing said 'fingers from pressing on saidfirst-named roller, and a third'roller rotatably mounted on said framein engagement with said first-named roller and circumferentially groovedat a plurality of points therealong opposite to said ngers so as topermit said fingers to approach into close proximity to the 'bite Vofsaid first-named roller and said third roller and to have the requiredswinging movement away from said rst-named roller. Y f v 12. In a rotaryduplicating mechanism, Vthe combination of a frame', a drumA 'rotatablymounted thereon and having a recess .infits face at one side of thedrum', means for supporting a copy sheet releasably on said drum withits'forward end portion extending over said recess, a stripping rollerrotatably mounted on said'frame in slightly spaced relation to the drum;means for driving said roller, a second roller rotatably mounted on saidframe in engagement with said first-named roller so asv to 'cooperatetherewith for pulling a copy sheet oli thedrum, said'roller beingcircumferentially grooved at a plurality of points therealong, a shaftrotatably mounted on said frame adjacent to said roller, arms' carriedby said shaft at opposite ends of said drum so as to swing in unisonabout said shaft', a second shaft mounted between said arms so as' tohave rotary movement with respect to the arms and arranged so as to movewith said'arms toward and from the roller tangentially ther`eof,`mean sfor moving said arms in timed relation to tlie rotation of the drum forcarryingfs'aid second shaft into and out of the recess'of "said 'Ydrum,fingers fixedly mounted 'on said secondsh'aft in position to engage theforward end'portion Fof said copysheet on the drum upon outward'movementof said second4 shaftf'for rnoving said copy sheet intol the lbiteof'sa'id'ltwo rollers with the fingers entering the grooves in saidsecond roll-v er, and means for givingY said second shaft a slightrocking movement for carrying said fingers away from the first-namedroller as the fingers come to their outermost positions for preventingthe fingers from pressing on said firstnamed roller. Y

13. In a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, astripping roller rotatably mounted on said frame Yin slightly spacedrelation to the drum, means for driving said roller, a shaft rotatablymounted on said frame adjacent to said roller, arms carried by saidshaft at opposite ends of said drum so as to swing in unison about saidshaft, a second shaft mounted between said arms so as to have rotarymovement with respect to the arms and arranged so as to move with saidarms toward and from the roller tangentially thereof, mea'nsfor movingsaid arms in timed relation lto the k'rotation of the drum for carryingsaid second shaft into' and out of thel recess of said drum, fingersXedly .mounted on said second shaft in positionto engagethe forward endportion of said copy sheet"'on the' rdrum upon outward movement of saidsecond shaft for moving said copy sheet intoengagementwith saidroller,`rol1erme'ans rotatably mounted on saidsecond shaft'in positiontohaveoperative engagement with said first-named roller when said secondshaft reaches its outermost position serving to cooperate with saidfirst-named roller for pullingthe engaged copy sheet off the drum, andmeans for giving said secondshaft a slight rocking movement forvcarrying lsaid fingers away ffrom lthe first-named roller as thefingers come tov their outermost positions vfor preventing the fingersfrom v'pressing on said first-named roller. V14. Inv a rotaryduplicating mechanism, the combination of a frame, a drum rotatablymounted thereon and having a` recess 'in' its face at one side vof thedrum, means for supporting a copy sheet releasably on said'drum with its'forward end portionr extending over vsaid` recess, a stripping rollerrotatably 'mountedon said frame in slightlyspaced relationftoY the'drum,means for driving vsaid rroller;ase'condroller rotatably mounted on saidframe Ainengagement with said first-named roller so as to cooperatetherewith for pulling4k a copy sheet off ltheedrum, said roller beingcircumfentially-groovedat'a plurality of'points thereal'ong, avshaftr'otat'abl'y mounted on said frame adjacent to 'said roller, armscarried by said'shaft `at opposite endsof said drum so as tolswing inunison about "said shaft, a second shaftnounted between said arms so'asto have rotary movement with respectto the arms and arranged soas'tomove with'sai'd arms toward and from the roller t'angentially thereof,means fon moving said"'armsfin`.timed relation to the rotation of thedrum'for carrying said second-shaft into and out of the recess of saiddrum', fingers Iixedly mounted on said second-shaft in position to'vengage the'fow'ard end` portion of said copy sheet onthe drum uponoutward-movement of said "second shaft for movigfsaid copy-sheet intothe #bite-"of lsaid two rollers with'the' fingers entering thegro'oves'in said second roller, roller means rotatablyy mounted'onfsaid'sec'ond shaft "inlposition' to have 'operative engagement withsaid rst-named roller when said second shaft reaches its outermostposition serving to cooperate with said firstnamed roller and saidsecond roller for pulling the engaged copy sheet oif the drum, and meansfor giving said second shaft a slight rocking movement for carrying saidngers away from f the irst-namedroller as the fingers come to theiroutermost positions for preventing the fingers from pressing on saidfirst-named roller.

15. In a rotary duplicating mechanism, the `combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, a

of said two rollers, means for moving said pusher member outwardly intimed relation to the rotation of the drum, and a third roller movableoutwardly with said pusher `member adapted by pressure outwardly on saiddriven roller `to reinforce thegrip on said copy sheet-for `assisting inthe stripping operation.

16. Ina rotary duplicating mechanism, the combination of a frame, a drumrotatably mounted thereon and having a Vrecess inits face at one side ofthe drum, means for supporting .a copy sheet releasably on said drumwith Aits forward end portion extending over said recess', a strippingroller rotatably mounted on said frame in slightly spaced relation tothe drum, means for driving said roller, .a second roller rotatablymounted in engagement with said first-named roller, pusher meanscomprising a plurality of outwardly extending lingers arranged insubstantially spaced relation to each other longitudinally of saidrollers and movable outwardly on said frame for pushing the forward endportion of a copy sheet on the drum into .the .bite of said rollers,means for moving said pusher means outwardly in timed relation to therota-4 tion of the drum, and a third roller movable outwardy with saidiingers in position `to press .the copyagainst 4said driven roller inspaced relation to said second roller Awhen said copy sheet has passedinto the bite of saidiirst-named two rollers. v

17. In a rotary duplicating mechanism, the combination of a frame, adrum :rotatably mountedthereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, alstripping roller rotatably mounted on said frame in slightly spacedVrelation to the -Vdrum, means for ,drivingA said roller, other Yrollermeans cooperating with said iirst-,named roller to grip a copy sheet forstripping it from the drum,

pusher means comprising a plurality of outward-V ly extendingl iingersmovably supported jon said:

frame independently of the drum and arranged in substantially spacedrelation'to eachother longitudinally of said roller. and Inovableout-Awardly on said frame into close proximity to. the line of contact of,saidother roller means with said firsts-,named roller for pushing theforward end portion Vof a copy sheet on Vthe drum into engagement withsaid driven roller, and means soA for moving said pusher means outwardlyin timed relation to the rotation of the drum. Y

18. In a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having a recess in its face at oneside of the drum, means for supporting a copy sheet `releasably onsaiddrum with its forward end portion extending over said recess, aVstripping roller rotatably mounted on said frame'in slightly spacedrelation to the drum, means for driving said roller, a second roller r0-tatably mounted in engagement with said firstnamed roller and having aplurality of circumferential grooves thereabout in spaced relation toeach other longitudinallyof the roller, pusher means comprising aplurality of outwardly extending flngers movably supported on the frameindependently of the drum and arranged in spacedY relation to each otherand movable outwardly into said groooves into close proximity to theline of contact of said two rollers for pushing the forward end portionof a copy sheet on the drum into the bite of said rollers, and meansformoving said pusher means outwardly in timed relation to the rotationof the drum.

19. In a rotary duplicating mechanism, the combination of a frame, adrum rotatably mounted thereon and having arecess in its face at oneside of the drum, means for supporting a copy sheet releasably on saiddrum with its forward end portion extending over said recess, vaV

stripping roller rotatably mounted on said frame in slightly spacedrelation to the drum, means. for driving said roller, a second rollerrotatably mounted in engagement with said first-named roller and havinga plurality of circumferential grooves thereabout in spaced relation toeach other longitudinally of the roller, pusher means comprising aplurality of outwardly extending lingers arranged in spaced relation toeach other and movable outwardly into Vsaid grooves for pushing theforward end portion of a copy sheet on the drum into the bite of saidrollers, means for moving `said pusher means outwardly in y timedrelation tothe rotation of the drum, -andV a third rollermovableoutwardly with said fingers in position to press the copy sheet againstsaid driven roller in spaced relation torsaid grooved roller when saidcopy sheet has passed v into the bite of `said first-named two rollers.ARTHUR J. LEVENHAGEN. ROBERT F. MORRISON.

